Sand-molding machine



(No Moden.) i 5 sheets-sheen 111..

Y J. R. UNIES.

ASAND MOLDING MACHINE.

No. 382,217. v Patented May 1, 1888.

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J. R. 'DAVIE SAND MOLDING MACHINE. No. 382,217.' Y `1;:1Lte11ted May 1, 1888.

N. PETERS. Phnto-Lixhogmpher. wnshingmn, D. c.

(No Model.) A 5 sheets-smet s.

J. R. DAVIES.

SAND MOLDING MACHINE. No. 382,217. Patented May 1', 1888..

Zwesses NA PETERS, Phnw-Lnhngmpher, washington, n4 CA (No Model.) 5 sheetssheen 4'.

-J. R. DAVIES. SAND MOLDING MACHINE.

No. 382,217. Patented May 1; 1888. 1

Hum v 'IM v lIl Y (N0 Model.)

)JL R. DAVIES.

SAND MOLDNG MACHINE.

5 Sheets-Sheet 5.

Patented May 1, 1888.

NJPEI Rs, Phonrulhognphar. waahingmn. D. C.

UNITED STATES PATENT EEICE.D

.IoHN E. DAvIEs, OE rULLMAN, ILLINOIS. y

SAND-MOLDING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 382,217. dated May l, 1883.

Application tiled October 4, 1887. Serial No. 251,408. (No model.)

To all whom it may concern.-

Be it known that I, JOHN R. DAVIEs, a citizen of the United States, residing at Pullman, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Sand-Molding Machines, of which the following is a specification. p

My invention relates to an improvement in the class of machines in which a mold is formed by tamping hy means of some power other than by hand the material known in the art of molding as sand77 in a iiask upon a pattern. A machine of the class mentioned is shown v and described in Letters Patent of the United States No. 365,584, granted me on the 28th day of June, 1887.

My present improvement is designed especially for use in connection with the flask and frame portion of my aforesaid formerly-pat ented machine, though it isnot necessarily, and I do not wish to he understood as considering that its use is confined to such connection.

My object is to provide a machine which shall serve to pack' the sand in the ask by the employment of means analogous to that of tamping by hand, but by far more effective andreliahle in producing the mold.

My invention consists in the general construction of my improved machine; and it further consists in details of construction andV combinations of parts.

In the drawings, Figure 1 is a partly broken sectional end elevation of my improved machine, showing my improved hopper in position above it; Fig. 2, a section taken on the line 2 of Figil and viewed in the direction of the arrow; Fig. 3, an enlarged broken portion of the device as shown in Fig. 2; Fig. 4, a sectional plan view taken on the lines 44of Figs. 1 and 2 and viewed in the direction of the arrows; Fig. 5, a plan view of the entire device, showing the arrangement of the pressure-conducting pipesjand having apart broken away to display a detail; and Fig. 6,a broken side elevation.

A is the frame-work of the device,carrying mechanism in the form of a hand wheel, t, operating by means of a nut, t, upon its screwthreaded shaft through levers t2 and liftersts. The parts thus referred to and their operation are fulfly described in Letters Patent of the United States No. 300,853, granted me on the 24th day of June, 1884.

A are vertical extensions of the frame A.

B is a square horizontal frame supported on the main frame A by brackets s, to which the part Bis rigidly secured, as shown. Screws r extend vertically upward from the four corners of the frame B through corresponding corners of a pattern-plate, C, and slot or silhouette plate D above the pattern-plate, and the screws serve to adjust the slot-plate 'to the co-called parting-line of the pattern.

E is the iiask, preferably of the form shown, which is that of a double taper, since thereby it best holds the sand.

The verticalextensions A of the frame A are4 4 provided with slots g2 toward their yupper ends to receive tongues g of horizontal holsters q,

and to which, on the outerside of the frame,

are bolted hars g3, having laterally-extending heads q* to afford hearings for the lower ends of screw-posts p, extending toward their npper ends through guide-hearings p on the upper part, A', ofthe main frame, and provided with hand-wheelsp?. The slots q2 afford guides for the vertical adjustment 4of the holsters, which extend through the machine from end to end, and areraised and lowered with ref erence to the depth or shallowness of the ask employed hy means of the screws p, operated from the hand-wheels p.

For a purpose hereinafter stated the frame A A and parts described as supported by it are duplicated, the holsters q extending throughout hoth frames. On their inner sides the holsters g are provided with longitudinal recesses o, having frietion-rollers mand longitudinal recesses o below the recesses o.

F is a sand-frame having tongues o2 extending from opposite sides into, therecesses o of the holsters wherein the frame is supported to permit its movement hack and forth on the tongues. The sandframe serves the usual purpose of affording an extension of theiiask to enable it to contain all the sand necessary .7, A.

IOO

-G is a hox, by prefereneeeorresponding in 'A outline with the opening to the fiask E; I

prefer to form the box G 'inthe manner of construction most .clearly represented-in Fig. 2--namely, of a'solid block of metal, m, bored to produce a desired number of vertical cham' bers or cylinderaj, and recessed on its inner, upper, and lower edges, as shown atx, to afford seats for plates Z and Z2, which respect? ively cover the upper and lower ends of the cylinders. A cap, G', is bolted to the upperl side of the part'm and is provided with a wall,` m', which coincides withthe wall separating the outermost series of cylinders Zfrom the inner ones and affords a chamber, lc, above the inner and a chamber, k', above the outer cylinders. Asimilar cap, G2, is bolted to the lower side of vthe part m and has a wall, mi, which coincides with the wall which separates the outermost series of oylindersZfrom the inner ones and affords the chambers k2 and k3. Openingsz' and Z lead into the cylinders Z, re- Spectively, throughthe heads or plates Z and Z2. Each cylinder Z containsa piston-head, h,

` from which a piston-rod, h', extends through the plate Z2, forming the head of the cylinder,

"the rods from the access to them of sand.

Tongues o3 extend from the opposite sides of the box G into the reeesseso on the bolsters q, and thus support the box on the .friction-rollers u and permit it to be slid back and forth,

inthe manner hereinafter' described.

i On corresponding ends of each bolster g is a cylinder, I, containing a piston and rod, g, the latter being connected at its end,which extends beyond thecylinder and is bent, as shown in Fig. 6, with a bracket, g', secured to the tongue o3 of the box below it, and the cy-linders I are connected by piping y, controlled by suitable valve mechanism to conduct pressure (steam, air, or hydraulic) simultaneously to or from corresponding sides of the pistons. Pipes f and f', Fig. 4, lead, respectively, into the chambers k k3 in the lower part of the box, and similar pipes (one of which is indicated in Fig. 2 as f2) lead, respectively, into the chambers k k at the upper end of the box. Exhaustpipes e lead, respectively, from the chambers k, k', k2, and k3. The pipes thus referred to are not described 'in detail, as they present no novel features, being designed-to introduce and exhaust the pressure which enters the chambers above and below the pistons h. They are controlledl by suitable valves in the usual manner, which permit the pressure to be introduced into chambers k and k or k and k3 separately or simultaneously, and of course permit the exhaust to'be produced corre/ spondingly. The connections of the various pipes with the pressure-supply must be ilexible in order to' permit sliding of the box, as hereinafter described.

My device is. intended to be operated by'- 'pletes the mold.l

lsteampressure, `though other duid-pressure lmaybe used.

My improved machine is operated as follows: With-the sand-frame F in positionover a flask, E, and the box G moved out of the way, sand islet into the flask from a hopper, K, which is of novel construction and forms an important auxiliary feature of my invention. It is supported in rigid position any desireddistance abovethe machine in line with the ask,and is provided inthe upper portion of its spout d with aslide-valve, d. Acap, K', snrrounds the spout d', and is also provided near its lower end,which is open,with a slide-valve, cZ'l, or other form of valve, and it is supported by ropes or the like, c, passing over pulleys c', and secured to thecap at opposite sides, and carrying weights c, which more than counterbalance the cap when empty. The

hopper is supplied from a suitable elevator,

is preferably o f a size to contain a quantityv sufficient to fill the flask,) and the weight of the sand thus admitted toathe cap lowers it toward the flask. When the cap is filled, the valve d is closed, either against the escape of a remainder of the contents of the hopper, if of a capacity greater than the cap,or to cause it to hold a new supply. When the cap reaches aposition of desired proximity to the flask, the valve dZ is opened, allowing the contents of the cap to discharge into the flask. After the discharge ofjits contents, the cap is automatically raised by the weights c2 into its position around the spout d. Steam is thenintroduced into the cylinders I upon the proper sides of the pistons therein to force the latter, and with them the box G, through its connection with the pistonrods g, hereinbefore described, in the direction to slide the boxinto position over the ask, when steam is admitted into the chamb\r k, whence it enters the .cylinders Z below it a d forces the pistons there- IOO IIO

in down, and with t em the ramping-heads,

upon the sand in the ask around the edges of the latter,with the resultant effect of peening or packing the sand around the `edges of the flask to form, so to speak, a firm foundation for the mold. The tampi 11g-heads are then raised by admitting steam into the chamber los and exhausting that previously intro duced into the chamber lc. After smoothing or leveling the sand inthe mold,(which is done by hand,) steam is admitted to both chambers k and k to force down all the pistonsA h and tamping-heads H, which produces tamping of the entire contents of the ask, and thus come All the tamping-heads-are then raised by admitting steamfinto the cham'- bers k2 and k3 and exhausting that previously introduced into the chambers handle. The two-tamping operations ofthe heads H, as thus described, (which heads, as will be seen, are sufficiently close together to cover sub- "the resilience of `which will serve to effect the raising upon relieving the pressure from above. It is also to be observed that while the tamping-heads are shown and described to'be provided in two independently-operative series only, they could readily be made independently operative in any desired number of series by increasing the number of walls m and m2 and providing suitable connections with the pressure supply and exhaust. On nishing the mold and preparatory to its removal the sand-frame F is slid back, thereby scraping from the iiask all sand extending above its edge, and adjusted over the other duplicate flask, E, of the machine, prepared, like that described, to be operated on by the tamping-heads during the tamping operation just described. The box G,with` its contents, is then also slid into position over such duplicate flask by admitting steam into the cylinders I on the proper sides of the pistons therein. Thus it will be seen that by providing the iiask and parts immediately connected with it in duplicate on the one or substantially the one frame the machine is enabled to perform double work, since one mold can be undergoing the process of completion while the other is undergoing the preparatory stage, and the one tamping device may be used alternately for each, and may be thus in continuous opera-V tion. 4

The rammer-heads are preferably, but not necessarily, of uniform size, and they produce uniform compacting of the sand-a matter which is practically impossible in tamping by hand-the differencesin the distance of descent of the rammers, as shown in Fig. 2, corresponding with the depressions and elevations in the pattern.

What I claim as new, and desire to secure by Letters Patent, isgl. In a sand-molding machine, the combination,with the frame, of a box having cylinders containing pistons, tamping-heads connected with the pistons, means for actuating the tamping-heads by fluid-pressure, and a wall Within the box separating the cylinders into an inner and an outer non-intercommuni eating series, whereby the tamping-heads of the outer series of cylinders may be actuated independently of those in the inner series to peen the sand* around the edges in the iiask, substantially as and for the purpose set forth. 2. In a sand-molding machine, the combination, with the frame, of a horizontally-sliding box, G, having cylinders Z, containing pistons h, tamping-heads H, connected with the pistons, and means for actuating the tampingeating, respectively, with the cylinders below them, and non-intercommunicating chambers k2 and 7c3, communicating, respectively, with the cylinders above them, pistonshin the said cylinders, tamping-heads H, connected with the said pistons, land duid-'pressure and exhaust pipes leading, respectively, to and .from the said chambers, substantially as and for the purpose set forth.

4. In a sand-molding machine, the combination, with the frame, of a horizontally-sliding box, G, containing cylinders Z, non-intercommunicating chambers Za and k', communieating, respectively, with the cylinders below them, and non-intercommunicating chambers k2 and k3, communicating, respectively, with the cylinders above them, fluid-pressure cylinders I, having their pistons connected with the box, and duid-pressure and exhaust lpipes leading, respectively, to and from the said chambers, substantially as and for the purpose set forth.

Y 5. VIn a sand-molding machine, the cumbi-` nation of a frame carrying two asks, E, a box supported to slide horizontally in the frame above the asks, rammers carried by the said box, and means for actuating the rammers by fluid-pressure to tamp the sand in the liask below the said box, substantially as described.

6. In a sand-molding machine, the combination, with the frame, of a vertically-adjustable horizontally-sliding box, G, having cyl-- inders Z, containing pistons h, tamping-heads H, connected with the pistons, and means for actuating the tamping-heads by fluid-pressure to tamp the sand, substantially as described.

7. In a sand-molding machine, the combination, with the frame, of a vertically-adjustable horizontally-sliding box, G, containing cylinders Z, non-intercommunicating chambers la and k', communicating, respectively, with the cylinders below them, and non-intercommunicating chambers k? and 7c3, communicating, respectively, with the cylinders above them, pistons h in the said cylinders, tamping-heads H, connected with the said pistons, and Huid-pressure and exhaust pipes leading, respectively, to and from the said chambers, substantially as and for the purpose set forth.

8. In a sand-molding machine, the combination, with the frame, of a vertically-adj ustable sliding box, G, containing cylinders Z,

`non-intercommunicating chambers k and la',

TOO

IIO

communicating, respectively, with the cylinders below them, and non-intercommunicating chambers k2 and k3, communicating, respectively, with the cylinders above them, fluid-pressure cylinders I, having their pistons connected with the box, and fluid-pressure ISO and exhaust pipes leading, respectively, to and from the said chambers, substantially as and for the purpose set forth.

9. In a sand-n1olding machine, the combination, with the frame, of a vertically-adjustable sliding box, G, containing cylinders l,

' nonintercommunicating chambers 7c and la',

communicating, respectively, with the cylinders below them, and non-intercommunicating chambers k2 and k3, communicating, respectively,with the cylinders above them, pistons h in the said cylinders having rods h exl tending through the base of the box and carrying tampingheads H, and flexible material,

h2, surrounding the rods between the tainpngheads and base of the box and secured tothe said base, substantially as and for the purpose set forth.

10. -In combination with a sand molding machine, a hopper supported above the flask and having a slidevalve, d, inV its spout, and a cap, K', supported by Weighted cables c on pulleys toV normally surround the" spout, and:r

having a valve, d2, substantially as described.

' JOHN R. DAVIES.

In presence ofn J. W. DYRENFORTH, GHAs. E. GAYLORD. 

